In Wanheda (Part 2), Bellamy, Monty, Indra, and Kane have been trapped in Sector 7 in the rover for three hours waiting for something to happen. Bellamy pokes his head out the roof and suddenly has a knife to his throat. The rest of them are ordered out of the rover as Bellamy is yanked out through the roof. Indra, Kane, and Monty are quickly taken hostage by what appear to be Azgeda warriors. Monty tries to fight them and Bellamy calls out his name to get him to stop. One of the warriors repeats Monty's name and Monty recognizes her voice as his mother's. Monty's mother, Hannah, removes her face mask and she and Monty embrace. Pike orders the rest to stand down and greets Kane and Bellamy. Monty asks where his dad is and Hannah tells him that he didn't make it. They go to move the trees blocking the rover and Bellamy asks Monty if he is okay. Monty replies that he has to be. They get the trees out of the way of the rover and Kane sends the Farm Station warriors to collect the rest of their people and head to Arkadia. Pike and Hannah go with Kane, Bellamy, and Monty to find Clarke.

Later, Monty asks Hannah what happened to his father and she tells him that all his father wanted to do was find Monty and that he loved him. Indra calls for everyone to be quiet as they hear war drums coming from a distance. Indra recognizes them as Azgeda by the three dead scouts in the field. Pike tells everyone they need to get the bodies off the field before the army arrives or they will be blamed for it. Bellamy spots Roan and Clarke far on the other side of the field as Kane spots the incoming army advancing from another end of the field, separating them from Clarke. Monty points out a cave for them to hide in until the army passes through and Indra leaves to warn the Commander because the Ice Nation has just marched into Trikru lands. Monty asks Hannah what happened to his father. Hannah tells him how Farm Station landed in snow, absorbing some of the impact. She starts crying and Pike takes over the story, telling Monty that the children were playing in the snow and were the first to die. Monty's father saved four of fifteen kids but was killed when he went back for the fifth and he died a hero.

In Watch the Thrones, Hannah is part of Pike's small militia who he assembled to attack the Grounders sent by Lexa, to protect Arkadia from any attack by the Azgeda. Lincoln stops them at the camp's entrance and holds a knife to a member of Farm Station's throat after he held a gun to Lincoln's head. Suddenly, an alarm sounds and Abby and Kane arrive with Ark Guards and place everyone under arrest. Hannah and the rest of the militia walk away chanting Pike's name. Later, in lock-up Hannah is present when Kane informs Pike that he was elected the new Chancellor.

In Nevermore, Hannah took the key to the City of Light. She meets Monty and Octavia at the dropship and tries to convince her son to take the chip as well. When he refuses she begins to beat him. Octavia tries to stop her but fails. Monty shoots Hannah and she dies.

In Red Sky at Morning, Jaha and A.L.I.E. use Hannah to distract Monty and Raven Reyes while they are hacking A.L.I.E's code. With Raven's help, Monty deletes his mother. However, the distraction is successful and A.L.I.E. is able to migrate her code to the Ark Ring, just as she is deleted from Arkadia and as her backpack is destroyed in Polis by Murphy.

Hannah is loyal to Charles Pike. Like many other survivors from Farm Station, she shows a dislike and distrust of Grounders. However, she seems to like children, including Grounder ones. This is shown in "Bitter Harvest" when she calling out to a Grounder boy, Gavriel, "Hello there. Don't be scared." However, when Gillmer reminded Hannah of the mission, she reluctantly orders the group to go after the boy.

Hannah is also a loving mother to her son, Monty. However, her loyalty to Pike seems to prevail, with her helping Pike use Monty to catch members of Kane's Faction.

Monty is Hannah's son. They appear to share a very close bond. After Hannah takes the Key to the City of Light, she falls under A.L.I.E.'s influence and tries to kill Monty. Octavia Blake appears to help, but Hannah ends up attacking her instead. With his friend's life on the line, Monty is forced to shoot his mother. His first shot is non-fatal, but because of A.L.I.E., Hannah doesn't feel any pain and continues her attack on Octavia, forcing Monty to fatally shoot his mom. When Raven attempts to externally hack the City of Light, A.L.I.E. tries to delay Monty and Raven by releasing whatever remains of Hannah's mind in the network to talk to him, but Monty decides to delete her rather than let Hannah be used against him like that.